Try to boot into the Safe mode. Now you uninstall that update:
Go to Settings → Windows Update → Update History → Uninstall updates
Remove the most recent update.
If you have enabled System Restore earlier, then enter the Recovery mode by force restart the device 3–5 times to trigger recovery. :
Go to Troubleshoot → Advanced Options → System Restore
Use another PC to create a Windows 11 installation USB via Media creation tool:
https://www.microsoft.com/en-in/software-download/windows11
Boot from USB
Repair your computer → Troubleshoot → Startup Repair